Battery box and battery pack

Abstract

This utility model provides a battery box and battery pack. The battery box includes: a box body, with a sealed chamber on at least one side of the box body, containing a non-Newtonian fluid; and a bottom protective plate connected to the bottom of the box body, with a sealed space between the bottom protective plate and the box body, containing a non-Newtonian fluid. This utility model solves the problem of poor protection in existing battery boxes.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery technology, and more specifically, to a battery box and battery pack. Background Technology

[0002] Electric vehicles are widely used globally due to their environmental friendliness and energy efficiency. However, the battery pack, as one of the core components of electric vehicles, has always been a focus of industry attention regarding its safety and durability. During vehicle operation, the battery pack faces various external mechanical impacts from complex road conditions, posing a serious threat to its physical integrity. Mechanical damage to the bottom of the battery pack is particularly significant. Although urban roads are generally smooth, speed bumps often exceed standard heights, with measured heights reaching as high as 8cm (far exceeding the standard 3cm-5cm). Steep entrances to underground parking garages, with some shopping malls having slopes reaching 18% (exceeding the national standard limit of 15%), also increase the probability of the battery pack bottoming out. It is worth noting that rural roads account for 85% of the total road mileage in China, and over 80% of these are below Grade IV or below, with a road surface damage rate reaching 38%. The unpredictability and ruggedness of these roads further exacerbate the risk of damage to the bottom of the battery pack. Furthermore, modern electric vehicles generally have a low ground clearance, with mainstream models having a ground clearance of 150mm or less, which is about 25% lower than the average ground clearance of traditional gasoline vehicles. While this design trend optimizes the vehicle's aerodynamic performance and driving stability, it also makes the battery pack more susceptible to damage in the event of an accidental impact. Specifically, when an electric vehicle encounters a protrusion (such as a speed bump), is struck by sharp gravel (energy ≥ 50 joules), or unfortunately suffers a bottoming-out accident (impact angle > 15°), the water-cooling plate at the bottom of the battery pack is easily damaged, leading to direct damage to the battery pack (due to the complex road conditions in China, battery damage caused by bottoming-out accidents accounts for 18.7% annually). The battery pack casing also faces severe challenges during vehicle collisions. The impact force during a full-vehicle collision can cause the battery pack casing to deform, dent, or even rupture. If the vehicle collides with an obstacle at a high speed, once the battery pack casing loses its integrity and shows obvious deformation and damage, it will lose effective protection for the internal cells and components. The internal cells and other critical components will be exposed, facing the risk of short circuits and leakage.

[0003] In existing technologies, cushioning foam is typically placed at the bottom of the battery pack to protect the bottom of the battery pack, thereby protecting the cells inside the battery box and reducing the risk of short circuits and leakage. However, while foam materials can absorb some energy when subjected to minor impacts, their deformation and compression capabilities are limited when subjected to high-intensity, high-energy impacts. Their energy absorption capacity quickly reaches its limit, making it difficult to provide continuous and effective protection, resulting in poor protection of the battery box. Utility Model Content

[0004] The main objective of this invention is to provide a battery box and battery pack that solves the problem of poor protection in existing battery boxes.

[0005] To achieve the above objectives, this utility model provides a battery box, comprising: a box body, wherein a sealed chamber is provided on at least one side of the box body, and a non-Newtonian fluid is provided in the sealed chamber; and a bottom protective plate, connected to the bottom of the box body, wherein a sealed space is provided between the bottom protective plate and the box body, and a non-Newtonian fluid is encapsulated in the sealed space.

[0006] Furthermore, the battery box also includes a package and a seal. The package has a package chamber and a filling port communicating with the package chamber. The package chamber is filled with a non-Newtonian fluid. The seal is sealed to the filling port. The package is installed between the bottom of the box and the bottom protective plate. The package chamber forms a sealed space.

[0007] Furthermore, the package includes two packaging plates made of rigid material, the edges of the two packaging plates are sealed together and form a packaging chamber, at least one of the two packaging plates is provided with a through hole, the through hole forming a potting opening; the sealant is made of sealant; or, the sealant is a sealing plug.

[0008] Furthermore, the package includes two package pieces made of flexible material, with a gap between one edge of one of the package pieces and the other of the package pieces to form a potting port for the introduction of non-Newtonian fluid; the remaining edge of one of the package pieces is sealed to the other of the package pieces to form a package chamber; the two edges with the gap are sealed together by thermocompression sealing.

[0009] Furthermore, the package is a bag-shaped structure integrally formed from a flexible material. The bag-shaped structure has a packaging chamber and a filling port communicating with the packaging chamber. The filling port is used to introduce non-Newtonian fluid and is then heat-sealed.

[0010] Furthermore, the package has at least one clearance through hole, which is not connected to the package cavity.

[0011] Furthermore, the bottom protective plate has a recess on the side facing the box body, the bottom protective plate is sealed to the box body, the recess is filled with a non-Newtonian fluid, and the inner wall of the recess and the bottom wall of the box body directly form a sealed space.

[0012] Furthermore, the bottom wall of the recessed part is provided with a connecting hole, and the battery box also includes a connecting pipe and a sealing component. One end of the connecting pipe is connected to the sealed space through the connecting hole, and the other end of the connecting pipe is provided with a sealing component.

[0013] Furthermore, the battery box also includes a sealing part. The connecting pipe includes a first pipe section, a second pipe section, and a third pipe section that are connected in sequence and arranged at an angle. The first pipe section is connected to the connecting hole. The second pipe section extends out of the edge of the bottom protective plate. The third pipe section extends upward from the second pipe section. The end of the third pipe section away from the second pipe section forms a liquid inlet. The liquid inlet is provided with a sealing part. The second pipe section is provided with a liquid outlet that communicates with the interior of the second pipe section. The liquid outlet is provided with a sealing part.

[0014] Furthermore, the enclosure includes a cover plate member, a bottom plate member, and a side plate member for forming an installation space. The side plate member is connected between the cover plate member and the bottom plate member. The installation space is used to accommodate the battery module. The side plate member is provided with a sealed chamber, an inlet end, and an outlet end. Both the inlet end and the outlet end are connected to the sealed chamber.

[0015] According to another aspect of the present invention, the present invention provides a battery pack, including the aforementioned battery box and a battery module installed inside the battery box.

[0016] By applying the technical solution of this utility model, compared with the prior art which only sets cushioning foam at the bottom of the box, this application sets non-Newtonian fluid in at least one side of the circumference and the bottom of the box. On the one hand, non-Newtonian fluid can absorb more impact energy than cushioning foam, thereby improving the impact resistance of the battery pack. Moreover, the viscosity change of non-Newtonian fluid is reversible. After the impact, when the shear force disappears, non-Newtonian fluid will return to its original low viscosity state and regain good fluidity. This reversibility allows non-Newtonian fluid to be reused many times and can still maintain its performance under repeated impacts, thereby providing continuous and effective protection to improve the protection effect of the battery box. On the other hand, it can not only protect the bottom of the battery pack, but also protect the circumference of the battery pack, thereby improving the safety and durability of the overall structure. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1A schematic diagram of the structure of one embodiment of the battery box of this utility model is shown;

[0019] Figure 2 A schematic diagram of the structure of one embodiment of the battery box of this utility model is shown;

[0020] Figure 3 It shows Figure 2 A schematic diagram of the battery box's casing and encapsulation components;

[0021] Figure 4 A schematic diagram of the bottom protective plate of one embodiment of the battery box of this utility model is shown;

[0022] Figure 5 It shows Figure 4 A partial enlarged view of the bottom protective plate component.

[0023] The above figures include the following reference numerals:

[0024] 10. Housing; 11. Cover plate component; 12. Bottom plate; 13. Side plate; 14. Inlet end; 15. Outlet end; 20. Bottom protective plate; 21. Recessed part; 22. Connecting hole; 30. Encapsulation component; 31. Clearance through hole; 40. Connecting pipe; 42. Second pipe section; 43. Third pipe section; 51. Sealing component; 52. Sealing part. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] like Figures 1 to 5 As shown, an embodiment of this utility model provides a battery box. The battery box includes: a box body 10, with a sealed chamber on at least one side of the box body 10 in the circumferential direction, and a non-Newtonian fluid disposed in the sealed chamber; and a bottom protective plate 20 connected to the bottom of the box body 10, with a sealed space between the bottom protective plate 20 and the box body 10, and the non-Newtonian fluid encapsulated in the sealed space.

[0027] In the above technical solution, compared with the prior art which only sets cushioning foam at the bottom of the housing 10, this application sets non-Newtonian fluid on at least one side of the circumference of the housing 10 and at the bottom of the housing 10. On the one hand, non-Newtonian fluid can absorb more impact energy than cushioning foam, thereby improving the impact resistance of the battery pack. Moreover, the viscosity change of non-Newtonian fluid is reversible. After the impact, when the shear force disappears, non-Newtonian fluid will return to its original low viscosity state and regain good fluidity. This reversibility allows non-Newtonian fluid to be reused many times and can still maintain its performance under repeated impacts, thereby providing continuous and effective protection to improve the protection effect of the battery pack. On the other hand, it can not only protect the bottom of the battery pack, but also protect the circumference of the battery pack, thereby improving the safety and durability of the overall structure.

[0028] In one embodiment, the non-Newtonian fluid can be an STF (Shear Thickening Fluid). An STF is typically a heterogeneous particle suspension formed by dispersing nano- or micro-sized particles into a Newtonian fluid. Its characteristics include good fluidity at low strain rates or low disturbances, exhibiting a fluid state; however, when subjected to impact or sudden force, its viscosity increases sharply with the shear rate, even exhibiting a near-solid state, capable of rapidly absorbing energy. When the external force is removed, it can return to a fluid state. In other words, the viscosity change of an STF is reversible. After the impact, when the shear force disappears, the STF returns to its original low viscosity state, regaining good fluidity. This reversibility allows the STF to be reused multiple times, maintaining its performance even under repeated impacts. Specifically, when the bottom of the battery pack is impacted or suddenly subjected to force, the STF's viscosity increases under impact, allowing it to effectively absorb and dissipate energy. When an object impacts the STF, its molecular structure changes, converting the impact energy into heat or other forms of energy through internal friction and energy conversion, thereby reducing the impact on the protected object. This protects the battery modules, base plate, and water-cooling plate inside the battery pack. When the bottom needs repair, only the damaged bottom plate and the damaged STF need to be replaced.

[0029] In one embodiment, the non-Newtonian fluid can also be a dilatant fluid.

[0030] In one embodiment, the housing 10 may not be equipped with a non-Newtonian fluid.

[0031] In one embodiment, only STP is provided in the sealed space and sealed chamber.

[0032] like Figures 1 to 3As shown in the embodiment of this utility model, the battery box further includes a package 30 and a seal. The package 30 has a package chamber and a filling port communicating with the package chamber. The package chamber is filled with a non-Newtonian fluid. The seal is sealed to the filling port. The package 30 is installed between the bottom of the box body 10 and the bottom protective plate 20, and the package chamber forms a sealed space.

[0033] In the above technical solution, by placing an encapsulation component 30 between the bottom of the housing 10 and the bottom protective plate 20, the encapsulation cavity is filled with a non-Newtonian fluid. The unique rheological properties of the non-Newtonian fluid allow it to maintain a low viscosity under normal conditions, making it easy to fill. However, when it encounters an external impact, the viscosity rises rapidly, providing excellent energy absorption and protection like a solid. This significantly enhances the impact resistance of the battery pack under various working conditions, effectively preventing damage to the internal cells due to bumps and reducing safety hazards such as short circuits and leakage. It also provides convenience for later maintenance and fluid replacement.

[0034] In one embodiment, the encapsulation 30 includes two encapsulation plates made of a rigid material, the edges of the two encapsulation plates are sealed together and form an encapsulation chamber, at least one of the two encapsulation plates is provided with a through hole forming a potting opening; the sealant is made of sealant; or, the sealant is a sealing plug.

[0035] The above-mentioned design not only effectively protects the packaging structure from damage caused by sharp objects during transportation, thereby reducing transportation costs, but also prevents harmful substances such as external air, water seals, and dust from entering, ensuring that the internal STF of the package 30 is not corroded.

[0036] Preferably, the encapsulation component 30 can be made of two metal sheets or two hard plastic sheets spliced ​​together, with a filling port left on the metal sheet or hard plastic sheet. After the STF fluid is filled, the filling port is sealed with sealant or a plug.

[0037] In one embodiment, the package 30 includes two package pieces made of a flexible material, with a gap between one edge of one of the package pieces and the other of the package pieces to form a potting port for the introduction of a non-Newtonian fluid; the remaining edge of one of the package pieces is sealed to the other of the package pieces to form a package chamber; the two edges with the gap are sealed together by thermocompression sealing.

[0038] In the above technical solutions, on the one hand, compared with rigid packaging, flexible packaging materials are usually lighter, making them easier to carry and transport, which is an advantage in some applications where weight is a requirement; on the other hand, packaging sheets made of flexible materials have good fit, which can closely fit the surface of the packaged object, providing good protection while reducing the packaging volume and space occupation.

[0039] Preferably, the flexible material can be a flexible polymer film or rubber, which can be bent and folded to adapt to encapsulated objects of different shapes and sizes, as well as applications in dynamic environments. After the STF fluid is filled from the filling port, thermo-press sealing is used to seal the two encapsulation sheets under certain temperature and pressure.

[0040] In one embodiment, the package 30 is a bag-shaped structure integrally formed from a flexible material. The bag-shaped structure has a packaging chamber and a filling port communicating with the packaging chamber. The filling port is used to introduce a non-Newtonian fluid, and the package is then sealed by thermocompression. Thus, flexible packaging materials are typically lightweight, making them easy to carry and transport, which is advantageous in some applications where weight is a constraint. Furthermore, the package 30 made of flexible material has good conformability, allowing it to fit tightly to the surface of the packaged object, providing excellent protection while reducing packaging volume and space occupation.

[0041] It should be noted that STF meets vehicle warranty requirements.

[0042] like Figure 3 As shown in the embodiment of this utility model, the encapsulation component 30 is provided with at least one clearance through hole 31, which is not connected to the encapsulation chamber. In this way, if the battery pack has lifting or other bolt tightening points, these can be avoided during encapsulation.

[0043] It should be noted that the clearance through hole 31 extends along the height direction of the battery pack. When setting the clearance through hole 31, sealant or flexible material can be used to separate the interior of the clearance through hole 31 from the encapsulation chamber to avoid leakage from the encapsulation chamber.

[0044] In one embodiment, such as Figure 4 and Figure 5 As shown, the bottom protective plate 20 has a recess 21 on the side facing the housing 10. The bottom protective plate 20 is sealed to the housing 10. The recess 21 is filled with a non-Newtonian fluid, and the inner wall of the recess 21 and the bottom wall of the housing 10 directly form a sealed space. In this way, STF can be directly filled between the bottom protective plate 20 and the bottom plate 12 (or water-cooling plate) of the battery pack, which can eliminate the encapsulation step and reduce production costs. During the encapsulation process, it is necessary to ensure a proper seal between the bottom protective plate 20 and the bottom plate 12 of the battery pack to prevent leakage.

[0045] Therefore, in one embodiment, such as Figure 4 and Figure 5 As shown, the bottom wall of the recessed part 21 is provided with a connecting hole 22. The battery box also includes a connecting pipe 40 and a sealing member 51. One end of the connecting pipe 40 is connected to the sealed space through the connecting hole 22, and the other end of the connecting pipe 40 is provided with a sealing member 51.

[0046] With the above configuration, the connecting pipe 40 can be directly integrated into the bottom protection plate 20. After the battery pack is assembled, low-cost STF can be directly filled between the bottom protection plate 20 and the bottom plate 12 of the battery pack through the connecting pipe 40. Then, when the battery pack is maintained, the STF can be replaced through the connecting pipe 40 to reduce the cost over the entire vehicle's life cycle (reduce the overall vehicle manufacturing cost and battery manufacturing cost). Alternatively, STF with a shorter shelf life can be filled. After the STF's shelf life expires, it can be replaced through the connecting pipe 40 to achieve long-term structural assurance.

[0047] In one embodiment, such as Figure 4 and Figure 5 As shown, STF can also be filled between the bottom protective plate 20 and the bottom plate 12 during the battery pack assembly process. That is, STF can be filled into the recess 21 of the bottom protective plate 20, and then the housing 10 can be installed on the bottom protective plate 20, so that the bottom protective plate 20 and the bottom plate 12 are sealed together.

[0048] In existing technologies, if the bottom of the battery pack suffers a minor impact, an ultrasonic thickness gauge can be used to check the remaining wall thickness of the water-cooling plate or to perform an airtightness test. Then, protective material is used to fill the dent, which is then cured and polished smooth. If the bottom of the battery pack suffers a moderate impact, the damaged water-cooling plate assembly needs to be replaced. If the bottom of the battery pack suffers a severe impact, the entire battery pack needs to be replaced. Therefore, existing protective measures are too costly to repair when dealing with impacts, and battery pack replacements are frequent and expensive. Therefore, this application addresses this issue by providing a connecting pipe 40 and directly filling the space between the bottom protective plate 20 and the bottom plate 12 of the battery pack with STF. This not only protects the bottom of the battery pack, reducing the probability of damage, but also allows for timely replacement of the STF at the bottom of the battery pack, thus reducing repair costs.

[0049] In one embodiment, such as Figure 4 and Figure 5 As shown, the battery box also includes a sealing part 52. The connecting pipe 40 includes a first pipe section, a second pipe section 42 and a third pipe section 43 that are connected in sequence and arranged at an angle. The first pipe section is connected to the connecting hole 22. The second pipe section 42 extends out of the edge of the bottom protective plate 20. The third pipe section 43 extends upward from the second pipe section 42. The end of the third pipe section 43 away from the second pipe section 42 forms a liquid inlet. The liquid inlet is provided with a sealing part 51. The second pipe section 42 is provided with a liquid outlet that communicates with the interior of the second pipe section 42. The liquid outlet is provided with a sealing part 52.

[0050] With the above setup, when STF needs to be filled, the STF fluid flows naturally into the inlet under gravity until the entire encapsulation chamber is filled, and then is sealed by the plug 51. Conversely, when the STF needs to be replaced or recycled, simply open the plug 52 at the outlet on the second pipe section 42, and the STF can flow out smoothly by gravity, without the need for complex external mechanical devices. This greatly simplifies maintenance operations, reduces costs, and ensures the isolation of the internal and external environments of the battery box and the safety of the battery pack.

[0051] In one embodiment, the sealing element 51 and the sealing part 52 can be a plug or a sealant sealant, etc.

[0052] In one embodiment, such as Figure 1 As shown, the housing 10 includes a cover plate member 11, a bottom plate member 12, and a side plate member 13 for forming an installation space. The side plate member 13 is connected between the cover plate member 11 and the bottom plate member 12. The installation space is used to accommodate the battery module. The side plate member 13 is provided with a sealed chamber, an inlet end 14, and an outlet end 15. Both the inlet end 14 and the outlet end 15 are connected to the sealed chamber.

[0053] In the above technical solution, the non-Newtonian fluid can be distributed in the sealed cavity of the side plate 13. When the battery box encounters a collision or impact from the side, the fluid in the sealed cavity can be transformed into a high-viscosity state, effectively absorbing and dispersing the impact energy, preventing direct damage to the battery module, and improving the safety of the battery box and its internal batteries under extreme conditions. When it is necessary to replace or replenish the non-Newtonian fluid, the inlet end 14 and the outlet end 15 provide convenient inlet and outlet. The fluid can be circulated and updated through these two ends without disassembling the entire box, which greatly simplifies the maintenance process, reduces maintenance costs, and extends the service life of the battery box.

[0054] Specifically, the side panel 13 includes a front side panel, a rear side panel, a left side panel, and a right side panel. Each side panel is made of aluminum profiles, which have cavities that form sealed chambers. The enclosure is sealed before leaving the factory. High-pressure interfaces, explosion-proof valves, and profile splicing positions must all be properly sealed. The high-pressure interfaces and explosion-proof valve mounting ports can be laser-cut before welding the front side panel, rear side panel, left side panel, and right side panel. Then, the cut cavities are sealed by welding aluminum plates to ensure the sealing of the sealed chambers.

[0055] In one embodiment, such as Figure 2 As shown, it is also possible to omit the inlet end 14 and the outlet end 15.

[0056] It should be noted that, due to the large cavity of housing 10, STFs with different lifespans can be selected.

[0057] It should be noted that, due to the presence of STF, the wall thickness of the existing underbody protection plate 20 or the box body 10 can be reduced, thereby reducing the overall vehicle weight.

[0058] An embodiment of this utility model provides a battery pack, including the aforementioned battery box and a battery module installed within the battery box. The battery pack possesses all the advantages of the aforementioned battery box, which will not be elaborated further here.

[0059] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: Compared with the prior art that only sets cushioning foam at the bottom of the box, in this application, by setting non-Newtonian fluid on at least one side of the circumference and the bottom of the box, on the one hand, non-Newtonian fluid can absorb more impact energy than cushioning foam, thereby improving the impact resistance of the battery pack. Moreover, the viscosity change of non-Newtonian fluid is reversible. After the impact, when the shear force disappears, the non-Newtonian fluid will return to its original low viscosity state and regain good fluidity. This reversibility allows non-Newtonian fluid to be reused many times and can still maintain its performance under repeated impacts, thereby providing continuous and effective protection to improve the protection effect of the battery box. On the other hand, it can not only protect the bottom of the battery pack, but also protect the circumference of the battery pack, thereby improving the safety and durability of the overall structure.

[0060] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery box, characterized in that, include: The box (10) has a sealed chamber on at least one side of its circumference, and a non-Newtonian fluid is provided in the sealed chamber; A bottom protective plate (20) is connected to the bottom of the housing (10), and a sealed space is provided between the bottom protective plate (20) and the housing (10), and the non-Newtonian fluid is encapsulated in the sealed space.

2. The battery box according to claim 1, characterized in that, The battery box further includes a package (30) and a seal. The package (30) has a package chamber and a filling port communicating with the package chamber. The package chamber is filled with the non-Newtonian fluid. The seal is sealed to the filling port. The package (30) is installed between the bottom of the box body (10) and the bottom protective plate (20). The package chamber forms the sealed space.

3. The battery box according to claim 2, characterized in that, The encapsulation component (30) includes two encapsulation plates made of rigid material. The edges of the two encapsulation plates are sealed together and form the encapsulation chamber. At least one of the two encapsulation plates is provided with a through hole, which forms the potting opening. The seal is made of sealant; or, the seal is a sealing plug.

4. The battery box according to claim 2, characterized in that, The package (30) includes two package pieces made of a flexible material, and a gap is formed between one edge of one of the package pieces and the other of the package pieces to form a potting port for the introduction of a non-Newtonian fluid. The remaining edge of one of the two package pieces is hermetically connected to the other of the two package pieces to form the package cavity; The two edges with a gap are sealed together by thermo-press sealing.

5. The battery box according to claim 2, characterized in that, The encapsulation component (30) is a bag-shaped structure integrally formed from a flexible material. The bag-shaped structure has the encapsulation chamber and a filling port communicating with the encapsulation chamber. The filling port is used to introduce a non-Newtonian fluid. The filling port is then sealed by heat pressing.

6. The battery box according to claim 2, characterized in that, The package (30) is provided with at least one clearance through hole (31), which is not connected to the package cavity.

7. The battery box according to claim 1, characterized in that, The bottom protective plate (20) has a recess (21) on the side facing the box (10). The bottom protective plate (20) is sealed to the box (10). The recess (21) is filled with the non-Newtonian fluid. The inner wall of the recess (21) and the bottom wall of the box (10) directly form the sealed space.

8. The battery box according to claim 7, characterized in that, The bottom wall of the recess (21) is provided with a connecting hole (22). The battery box also includes a connecting pipe (40) and a sealing member (51). One end of the connecting pipe (40) is connected to the sealed space through the connecting hole (22), and the other end of the connecting pipe (40) is provided with the sealing member (51).

9. The battery box according to claim 8, characterized in that, The battery box also includes a sealing part (52). The connecting pipe (40) includes a first pipe section, a second pipe section (42) and a third pipe section (43) that are connected in sequence and arranged at an angle. The first pipe section is connected to the connecting hole (22). The second pipe section (42) extends out of the edge of the bottom protective plate (20). The third pipe section (43) extends upward from the second pipe section (42). The end of the third pipe section (43) away from the second pipe section (42) forms a liquid inlet. The liquid inlet is provided with the sealing part (51). The second pipe section (42) is provided with a liquid outlet that communicates with the interior of the second pipe section (42). The liquid outlet is provided with the sealing part (52).

10. The battery box according to any one of claims 1 to 9, characterized in that, The housing (10) includes a cover plate component (11), a bottom plate component (12), and a side plate component (13) for forming an installation space. The side plate component (13) is connected between the cover plate component (11) and the bottom plate component (12). The installation space is used to accommodate the battery module. The side plate component (13) is provided with the sealed chamber, an inlet end (14), and an outlet end (15). The inlet end (14) and the outlet end (15) are both connected to the sealed chamber.

11. A battery pack, characterized in that, It includes the battery box according to any one of claims 1 to 10 and the battery module installed in the battery box.

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